The Gunn power supply delivers the DC and control voltages required for the operation of the Gunn oscillator and PIN modulator and
enables the demodulated microwave signal to be quantitatively evaluated. Furthermore, this unit has various inputs and outputs
for experiments on modulation and characteristics.
Design: 19" table-top unit with stand.
Gunn Power Supply
- Gunn voltage: - 10 V < UG < 0 V adjustable via 10-turn potentiometer, short-circuit proof
- Gunn current: max. 200 mA
- Display: 0...10 V, 0...200 mA, LED display for selected scale
- Movement: class 1.5 with mirror scale
- Outputs/inputs:
- GUNN: DC supply of the Gunn oscillator
- X/Y: for recording characteristics using an XY recorder
- DOPPLER OUT: for experiments with Doppler radar
- MOD IN: for direct modulation of the Gunn oscillator, input
signal max. ± 10 V
PIN Modulator
- Clock oscillator: 976 Hz, 0...5 V, 0...10 mA, short-circuit proof
- Outputs/inputs:
- PIN: toggle switch position determines internal modulation
through the clock oscillator or for external modulation
- MOD: for external modulation of the PIN modulator, input
signal max ± 10 V
Homodyne SWR Meter
- Principle: Lock-in detection with internal synchronization through the clock oscillator
- Dynamic range: 0...55 dB can be set in 12 steps,
additional 5 dB available via variable gain - Sensitivity: 1 µVrms for full scale deflection
- Accuracy: ± 0.3 dB over the whole range
- Mid-frequency: 976 Hz
- Bandwidth: 10 Hz
- Display:
- Power scale: + 0.5 dB...- 20 dB (calibrated in dB for square-
law detectors)
- SWR scale: 1.00...5
- Linear scale: 0...100 % (0 dB corresponds to 100 %)
- Movement: class 1.5 with mirror scale - Inputs/outputs:
- INPUT: unbiased, impedance 10 kΩ
- AMP. OUT: DC output for the measurement voltage
Mod
- Inputs/outputs:
- Input: jointly for ANALOG and TTL, impedance 50 Ω
- Analog Out: analog signal max. ± 2 V, bandwidth 1 MHz,
gain approx. 30
- TTL Out: TTL level
- All in-/outputs are connected with BNC sockets - Mains connect.: 115/230 V, 50 Hz, approx. 20 VA with mains connection cable and earthing-pin plug
- Dimensions: 500 x 330 x 150 mm (L x W x H)
- Weight: approx. 8 kg
